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Method for producing ethylene and propylene

A technology for propylene and ethylene, which is applied in the field of efficient catalytic production of ethylene and propylene from oxygen-containing compounds such as methanol or dimethyl ether, and can solve the problems of low selectivity and low yield of ethylene and propylene

Active Publication Date: 2010-06-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the low yield and low selectivity of the target product ethylene propylene in the prior literature and technology, and a new method for producing ethylene and propylene is provided

Method used

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  • Method for producing ethylene and propylene
  • Method for producing ethylene and propylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The test is attached figure 1 The shown device uses SAPO-34 as a catalyst, methanol as a raw material, and butene-2 ​​as a passivating agent. The reaction conditions of the first fluidized bed reactor are: reaction temperature 480°C, reaction pressure 0.04MPa, contact time 6 seconds, The catalyst to methanol weight ratio was 1. The second fluidized bed reactor reaction condition is: reaction temperature 400 ℃, pressure 0.06MPa, control second fluidized bed reactor catalyst coke amount is 3%, its reaction result is: ethylene yield 48%, propylene yield 31%.

Embodiment 2

[0020] The test is attached figure 1 The device shown uses SAPO-34 as a catalyst, methanol as a raw material, and methanol as a passivator. The reaction conditions of the first fluidized bed reactor are: reaction temperature 450°C, reaction pressure 0.02MPa, contact time 3 seconds, catalyst and methanol The weight ratio was 0.6. The second fluidized bed reactor reaction condition is: reaction temperature 470 ℃, pressure 0.02MPa, control second fluidized bed reactor catalyst coke amount is 2%, its reaction result is: ethylene yield 45%, propylene yield 29%.

Embodiment 3

[0022] The test is attached figure 1 The device shown uses SAPO-34 as the catalyst, dimethyl ether as the raw material, and naphtha as the passivating agent. The reaction conditions of the first fluidized bed reactor are: reaction temperature 580°C, reaction pressure 0.8MPa, contact time 10 seconds , the weight ratio of catalyst to dimethyl ether is 1.1. The second fluidized bed reactor reaction condition is: reaction temperature 600 ℃, pressure 0.9MPa, control second fluidized bed reactor catalyst coke amount is 10%, its reaction result is: ethylene yield 42%, propylene yield twenty two%.

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Abstract

The present invention relates to one kind of ethylene and propylene producing process with high selectivity and high yield. The production process includes the following steps: 1. reaction of oxygen compound material in the first fluidized bed reactor through contacting with catalyst I to produce effluent I containing ethylene, propylene and C4 and C4+ hydrocarbons; and treating the effluent I ina post step; 2. regenerating the catalyst II to be regenerated from the first fluidized bed reactor through contacting with the regenerating gas in the regenerating reactor; 3. deactivating the regenerated catalyst III from the regenerating reactor through contact with deactivator capable of producing carbon deposit in the second fluidized bed reactor; and 4. returning the deactivated catalyst IVto the first fluidized bed reactor. The production process may be applied in industrial production.

Description

technical field [0001] The invention relates to a method for producing ethylene and propylene, in particular to a method for using a regenerated catalyst passivation treatment system to passivate the regenerated catalyst to realize efficient production of ethylene and propylene by catalyzing oxygen-containing compounds such as methanol or dimethyl ether. Background technique [0002] Petrochemical industry is an important pillar industry in the national economy. It provides a large amount of chemical raw materials for industry, agriculture, transportation and national defense. It is one of the most relevant and leading industrial sectors in the national economy. Propylene and ethylene are the two most important basic raw materials for modern petrochemical industry. [0003] The bulk downstream products of ethylene mainly include polyethylene, ethylene oxide, ethylene glycol, polyvinyl chloride, styrene, vinyl acetate, etc. The size of ethylene production is a sign to measur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/20C07C11/04C07C11/06
CPCY02P20/52Y02P20/584Y02P30/20Y02P30/40
Inventor 谢在库刘俊涛钟思青张惠明
Owner CHINA PETROLEUM & CHEM CORP